code: def elem_shape(self):
      if self._elem_type == types.unknown:
          return None
      return self._elem_type.get_shape()
  
imports: from coremltools.converters.mil.mil import types
  from coremltools.converters.mil.mil.types.symbolic import is_symbolic, any_symbolic
label_desc: Use image node_id 6 for calling the ListVar obj's underlying member method code with example usage: obj.elem_shape() and returns: self, None